If you want to be a pilot and get trained without paying for it then join whichever air force your nationality allows you to! I too was a 15 year old wanabee pilot once. At 18 I joined the RAF, flew single seat supersonic aircraft when I was 20, was a 4 jet captain at 23, and have just completed my 50th year in military aviation(only in the sim these days though)! Of course if you want to just fly airliners from A to B then you'll need fork out a large sum of money unless you can get on an airline sponsored training program. Trust me, air to air combat or low level bombing is much more fun.